Analzye the following spectra, and propose a structure for each. The bottom set of 3 spectra are DEPT spectra, top: CH only, middle: CH, CH3 up, CH2 down, bottom: normal BB decoupled spectrum. Explain your assignments . Analyze means determine integrals, draw splitting trees, determine carbon type (C, vs CH vs CH2 vs CH3 and structural environment. Use ChemDraw to check your proposed structure (include output),
ANSWER: To propose the structure from the given NMR data,
Based on the above data, the most probable structure is given below.
Analzye the following spectra, and propose a structure for each. The bottom set of 3 spectra are ...
Use the spectra below to determine the molecular formula and chemical structure of the unknown compound. MASS 142 % of Base Peak 1147 40 50 70 80 5 100 % Transmittance Jari- 3000 1000 4000 'H NMR 300 MERE 2000 Wavenumber (cm) 3.0 25 20 15 Ppm 4.0 3.5 C/DEPT NMR 75.5 MHz ppm 60 50 40 80 70 90 100 110 120 170 160 150 140 130 ppm 4.5 4.0 3.5 3.0 2.5 2.0 1.5 ppm COSY 300 MHz...
A variety of spectra for an organic compound with molecular formula C10H16O are presented below. The experimental accurate mass using (+) APCI source is 153.1280 u. The 1H, 13C, COSY, HSQC and HMBC NMR spectra are given in the following slides. Propose a structure for this unknown and answer or address the following questions or requirements: a. Using the most abundant isotopes of C, H and O, what are the errors in ppm and milli-Daltons for the experimental accurate mass?...
In this problem you have to elucidate the structure of product B. A substrate A (structure shown in scheme 1) which was subjected to two consecutive reactions as shown in scheme 1 below to give the product B of molecular formula CsH14Br2. Provide the structure for Product B based on the NMR data provided (attachment 2: Problem set 2). (The 1H NMR and 13C NMR of starting substrate A has been provided for reference purpose only) 1. MnO2, CHCI3, rt,...
A variety of spectra for an organic compound with molecular formula C10H16O are presented below. The experimental accurate mass using (+) APCI source is 153.1280 u. The 1H, 13C, COSY, HSQC and HMBC NMR spectra are given in the following slides. Propose a structure for this unknown and answer or address the following questions or requirements: d. If there are still any questionable assignments, propose additional NMR experiments which would solve those questions and briefly explain specifically what correlations you...
Problem set 2: (25 marks) In this problem you have to elucidate the structure of product B. A substrate A (structure shown in scheme 1) which was subjected to two consecutive reactions as shown in scheme 1 below to give the product B of molecular formula CsH14Br2. Provide the structure for Product B based on the NMR data provided (attachment 2: Problem set 2). (The 1H NMR and 13C NMR of starting substrate A has been provided for reference purpose...
Propose a reasonable structure based on the molecular formula, the 1H NMR, and the proton–decoupled 13C NMR data below. The unknown compound has a molecular formula of C7H16O and * = CH2 by DEPT. Propose a reasonable structure based on the molecular formula, the 'H NMR, and the proton-decoupled 13C NMR data below. The unknown compound has a molecular formula of C7H160 and * = CH2 by DEPT. 'H NMR 3H 8H 13C NMR 2H (CH3)4 Si 26 VIH them...
Identify the compound C8H9NO2 from its 1H, 13C/DEPT, COSY, HMQC, and INADEQUATE spectra and show all correlations. 'H NMR 600 MHz 5480 5470 Hz 5200 5190 Hz 4910 4900 Hz 4370 4360 Hz 2590 2580 Hz 790 780 Hz 9.0 8.5 8.0 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 ppm 13C/DEPT 150.9 MHz 160 150 140 130 120 110 100 90 80 70 60 50 40 30 ppm 274 CHAPTER 5 Two-Dimensional NMR Spectroscopy Exercise...
From the given spectrums, what is the structure. label the carbons and hydrogens MASS of Base Peak 30 10 90 100 110 120 Transmittance 3066 012 2910 3000 4000 'H NMR 600 MHZ 2000 Wavenumber (cm-1) 3680 3660 Hz 3300 3280 H z 3220 3200 Hz 2760 2740 Hz 6.2 6.0 5.8 5.6 5.4 5. 2 5.0 4.8 ppm 7.4 7.2 7.0 6.8 6.6 6.4 C/DEPT NMR 150.9 MHz 160 150 140 130 120 110 100 90 80 70 ppm...
Label the spectra and propose a structure for the compound. The IR spectra are listed in the translation. Compound 2 R Spectrum Medisch 3400 1720 4000 3000 1600 vomi) 1200 183 Mass Spectrum So base UV Spectrum mas 253 nm 109,9€ 2.6) homas 250 nm 109,96 2.7) ho mar 284 m 109,0 2.5) M -220N) CH2O| 280 40 80 120 160 200 240 13C NMR Spectrum (100 . CDC, DEPT CH CH CH protondeco 200 160 1 20 80 400...
3. Find the structure of a compound given the MS, IR, and NMR data below. When you have the solution, use it to determine the correct multiplicity of the signal at 5.1 ppm and explain the coupling pattern. A correct answer with no explanation will receive no credit. MASS 951 FL 100 128 1107 677 r69 r45 50 557 811 130 120 100 110 90 80 70 60 50 mt IR 100 50 2000 Wavenumber (cm-1) 1000 3000 4000 'H...